A vitamin E-deficient diet affects nerve regeneration in rats

E B Enrione, O I Weeks, S Kranz, J Shen

Research output: Contribution to journalArticle (Academic Journal)peer-review

17 Citations (Scopus)

Abstract

Degenerative changes in the neuromuscular system have been found in animals and humans with vitamin E (E) deficiency. This morphologic study examined the effect of dietary E on the regeneration of peripheral nerves in male Sprague-Dawley rats. After feeding an E-sufficient diet (dl-alpha-tocopheryl acetate 50 mg/kg diet) for 6 d, 24 rats were randomly and equally assigned to one of three groups: control (CTRL) fed an E-sufficient diet for 43 d without surgery, normal (NE) fed an E-sufficient diet, or low (LE) fed an E-deficient diet (dl-alpha-tocopheryl acetate 0 mg/kg diet). After 22 d of feeding, NE and LE had surgical compression of the right sciatic nerve and continued eating for 15 d. On day 43, the right triceps surae muscles and a segment of the right sciatic nerve were removed, then all rats were euthanized. The nerve and muscles were processed for morphologic analyses. Presurgery and postsurgery LE ate less food (P < 0.048 and P < 0.001, respectively), which resulted in a lower body weight gain (P < 0.0002). LE had irregularly shaped and less myelinated axons than NE (P < 0.0001) and CTRL (P < 0.0001). The LE plantaris muscle had less type II fibers when compared with NE (P < 0.007) and CTRL (P < 0.03). The results suggest that an E-deficient diet affects food intake, impairs nerve regeneration, and decreases type II fibers, whereas an E-sufficient diet contributes to normal axon regeneration.

Original languageEnglish
Pages (from-to)140-4
Number of pages5
JournalNutrition
Volume15
Issue number2
Publication statusPublished - Feb 1999

Keywords

  • Animals
  • Body Weight
  • Diet
  • Eating
  • Male
  • Microsurgery
  • Muscle, Skeletal
  • Nerve Fibers
  • Nerve Regeneration
  • Rats
  • Rats, Sprague-Dawley
  • Sciatic Nerve
  • Vitamin E
  • Vitamin E Deficiency

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